Rheologica Acta

, Volume 49, Issue 10, pp 985–991

Elastic yielding after step shear and during LAOS in the absence of meniscus failure

Original Contribution

DOI: 10.1007/s00397-010-0465-6

Cite this article as:
Li, X. & Wang, S. Rheol Acta (2010) 49: 985. doi:10.1007/s00397-010-0465-6

Abstract

This work examines the possibility that the previously observed elastic yielding, i.e., nonquiescent relaxation after a large step shear (Ravindranath and Wang, Macromolecules 40:8031–8039, 2007) is due to an intrinsic experimental difficulty technically known as edge fracture. By redesigning the rheometric apparatus to eliminate edge failure, we show by an example of a well-entangled polymer solution that elastic yielding still occurs in the absence of any edge failure. We are also able to confirm that shear banding during large amplitude oscillatory shear (Ravindranath and Wang, J Rheol 52:341–358, 2008a) is an inherent rheological characteristic related to internal yielding of the entanglement network.

Keywords

Elastic yieldingStep strainNonquiescent relaxationEdge fractureNonlinear rheology

Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  1. 1.Department of Polymer ScienceUniversity of AkronAkronUSA